How does the development of nicotine addiction differ in teens and adults?

Why the pulse and respiration taken together? Can bronchitis cause fatigue? What are some symptoms of gallstones? What starts first in puberty for boys? Your period is heavy and lasting longer? Can oxistat be used for eczema? Do you need typhoid injection more than once? Can a woman who smokes pot during her entire pregnancy have a healthy baby? Do the veins rely on any other body part to work? What are the two positions in the heart where there are dense regions of conductive tissue? I did have irregular periods but the past two months they have gone into a pattern my cycles can go up2 35days so anyway its going down in 3's like day 35 the day 29 then day 26 is dat a gd thing? Do you add a degree when taking temperature on the temple? Buds are produced at the nodes? Does your tongue have anything to do with thyroid problems? Why is your gum and cheek so painful 3 days after tooth extraction when the site of the extraction itself is healing well? What does having ulcers on the bottom of your tongue mean? How many glasses of water should person drink a day how many oz? What body systems are responsible for support and locomotion? How can you train your bladder in males? Is the mumps an active or hidden virus?